vlan port lost connection after reload

[yaredo70]

Hi All,

I recently have an issue with some of the switches lost the VLAN connection after the switch reload. sh int command showed interface down and protocol down. I have to assign the VLAN after reboot. any idea why the switch lost its VLAN?

Thanks,

[Flavio Miranda]

Hi

 what is the switch model and IOS version ?

[yaredo70]

it happened on different models 2960X, 3560CX the IOS version - ...152-7.E8.bin 

[MHM Cisco World]

assign vlan ? can you more elaborate 
the vlan SVI is down ?
the VLAN SVI IP is disappear ?
the port vlan assign disappear ?
the vlan not show in show vlan ?

[yaredo70]

Hello 

Sorry for the late reply. 

The port VLAN assign disappear after the switch reboot.  I have to run SW#switchport access vlan 999 command on that port  

[MHM Cisco World]

The vlan disappeared from vlan db' check vtp  the vtp server push vlans list  not include this vlan.

[yaredo70]

How do I solve it if that is the issue? please include the commands. Thanks.

[MHM Cisco World]

In vtp server of vtp domain' only add

Vlan x

This make vtp push the vlan and even if the sw reboot it always have this vlan in db and it will not disappear from port 

[Martin L]

is  VTP  in transparent mode ? if so, then all vlans are stored locally in start up config; if not, vlans are stored in vlan.fat file on flush of switch; if VTP mode is client, you cannot add or remove vlan x; it must be done on VTP server switch or change VTP client to server mode.  

Regards, ML
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